Volume-adjustable backpack
By designing the adjustment belt structure, a closed ring is formed to carry the overall load under force, which solves the problem of easy damage to the existing backpack when folded and stored in the expansion part, and achieves stable load bearing and aesthetics of the backpack.
Patent Information
- Application Number
- CN202421624317.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-10
AI Technical Summary
When the existing volume adjustable backpack is folded and stored in the expansion part, it is easy to cause insufficient load-bearing strength at the connection and lead to pulling damage.
An adjustment belt structure is designed, including an upper connecting belt structure, a lower connecting belt structure and a backpack buckle to form a closed ring body to ensure that the weight of the item in the contracted state of the expansion part is carried through the overall stress and avoiding single-point stress.
It effectively avoids pulling damage caused by single point of stress, ensures the stable bearing of the backpack body when folding and storing the expansion part, and improves the service life and aesthetics of the backpack.
Smart Images
Figure CN222803995U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of backpacks, and more specifically to a backpack with adjustable volume. Background Art
[0002] Backpack refers to a bag carried on the back. It is made of various materials, including leather, plastic, polyester, canvas, nylon, cotton and linen. In an era when individuality is increasingly emphasized, various styles such as simple, retro, and cartoon also cater to the needs of fashion people to express their individuality from different aspects. The styles of bags have also expanded from traditional business bags, school bags, and travel bags to pencil cases, coin purses, and small sachets.
[0003] In order to facilitate people to store items, existing backpacks usually have an expansion part at the bottom of the backpack to adjust the volume of the backpack space. The contraction and fixation of the expansion part is usually achieved through connections set on both sides. However, when the expansion part is folded and stored for use, the weight of the items inside the backpack will be borne by the connection point between the connecting belt and the backpack, and the bearing strength of the point connection between the connecting belt and the backpack is limited. If some heavy items are stored inside the backpack, it is easy to cause the connection to be pulled and damaged. In view of this, we propose a backpack with adjustable volume. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, meet practical needs, and provide a backpack with adjustable volume to solve the technical problem that the current backpack with adjustable volume is easily damaged.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a backpack with adjustable volume, comprising a backpack body, an expansion part arranged at the bottom of the backpack body, an adjustment belt structure arranged around the backpack body, the adjustment belt structure comprising an upper connecting belt structure, a backpack tower buckle and a lower connecting belt structure, the upper connecting belt structure is connected with the lower connecting belt structure through the backpack tower buckle to form a closed loop, the two ends of the lower connecting belt structure are movably connected with the backpack tower buckle, the upper connecting belt structure bypasses the upper part of the backpack body, and the lower connecting belt structure bypasses the lower part of the backpack body and the expansion part;
[0006] The lower connecting belt structure includes a third connecting belt, a middle section of the third connecting belt is a wrapping groove, and the wrapping groove wraps the extension part.
[0007] The utility model adopts a designed adjustment belt structure, which is mainly composed of an upper connecting belt structure, a lower connecting belt structure and a backpack tower buckle. The upper connecting belt structure is connected with the lower connecting belt structure through the backpack tower buckle to form a closed loop body. The upper connecting belt structure bypasses the upper part of the backpack, and the lower connecting belt structure bypasses the lower part of the backpack main body and the expansion part, so as to adjust the extension of the expansion part. When the expansion part is in a contracted state, the weight of the items inside the backpack main body is transmitted to the backpack main body through the closed loop body, so that the overall force bearing is carried out, the stability of the force is ensured, and the situation that the force bearing part is pulled and damaged due to single-point force can be effectively avoided. When the expansion part is folded and stored, the wrapping groove can completely store the expansion part, thereby avoiding exposure of the expansion part, which can greatly improve the overall aesthetics of the backpack, and some items can be stored inside the wrapping groove, such as umbrellas, water cups, etc., which makes the backpack more practical.
[0008] Preferably, the upper connecting belt structure comprises a first connecting belt, a second connecting belt and a buckle, and the second connecting belt is movably connected to the corresponding end of the first connecting belt through the buckle.
[0009] Preferably, the lock buckles are fixedly arranged at two ends of the top of the second connecting belt, and button holes corresponding to the lock buckles are opened at two ends of the first connecting belt, and the lock buckles are buckled with the button holes.
[0010] Preferably, the bottom of the second connecting belt is arranged at the sleeve end, and the sleeve end is fixedly connected to the backpack tower buckle.
[0011] Preferably, a notch is provided on the surface of the first connecting belt, and the notch corresponds to a zipper of the backpack body.
[0012] Preferably, a plurality of groups of perforated belts are equidistantly arranged around a circumference of the backpack body, and the first connecting belt passes through the perforated belts.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model is designed with an adjustment belt structure, which is mainly composed of an upper connecting belt structure, a lower connecting belt structure and a backpack tower buckle. The upper connecting belt structure is connected to the lower connecting belt structure through the backpack tower buckle to form a closed loop. The upper connecting belt structure bypasses the upper part of the backpack, and the lower connecting belt structure bypasses the lower part of the backpack main body and the expansion part, thereby adjusting the extension of the expansion part. When the expansion part is in a contracted state, the weight of the items inside the backpack main body is transmitted to the backpack main body through the closed loop body to carry the overall force, ensuring the stability of the force, and effectively avoiding the situation where the force-bearing part is pulled and damaged due to single-point force, thereby solving the technical problem that the current volume-adjustable backpack is easily damaged. Therefore, the backpack main body of the utility model can bear the overall force on the expansion part in the folded and stored state, so that it is not easy to be pulled and damaged.
[0015] 2. The middle section of the third connecting belt in the lower connecting belt structure of the utility model adopts a wrapping groove structure design. The wrapping groove can wrap the expansion part. The third connecting belt can quickly realize the positioning support of the expansion part through the wrapping groove, and it is not easy to slide. It can also increase the supporting force area of the expansion part and have a restraining effect on the expansion part, thereby ensuring the supporting stability of the expansion part, and the expansion part is not easy to deform. When the expansion part is folded and stored, the wrapping groove can completely store the expansion part, thereby avoiding the expansion part from being exposed, which can greatly improve the overall aesthetics of the backpack, and some items can also be stored inside the wrapping groove, such as umbrellas, water cups, etc., which makes the backpack more practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the main structure of the backpack of the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the adjustment belt of the utility model;
[0019] Figure 4 This is a schematic diagram of the upper connecting belt structure of the utility model;
[0020] Figure 5 This is a schematic diagram of the lower connecting belt structure of the utility model;
[0021] Figure 6 For the utility model Figure 4 Enlarged schematic diagram at point A in the middle.
[0022] Description of the numbers in the figure:
[0023] 1. Backpack body; 101. Extension part; 102. Perforated belt; 2. Adjustment belt structure; 3. Upper connecting belt structure; 301. First connecting belt; 302. Second connecting belt; 303. Sleeve end; 304. Notch; 305. Button hole; 306. Lock; 4. Backpack tower buckle; 5. Lower connecting belt structure; 501. Third connecting belt; 502. Wrapping slot. DETAILED DESCRIPTION
[0024] like Figures 1 to 6 As shown, the utility model relates to a volume adjustable backpack, comprising a backpack body 1, an expansion portion 101 is arranged at the bottom of the backpack body 1, an adjustment belt structure 2 is arranged around the backpack body 1, the adjustment belt structure 2 comprises an upper connecting belt structure 3, a backpack tower buckle 4 and a lower connecting belt structure 5, the upper connecting belt structure 3 is connected with the lower connecting belt structure 5 through the backpack tower buckle 4 to form a closed loop, the two ends of the lower connecting belt structure 5 are movably connected with the backpack tower buckle 4, the upper connecting belt structure 3 bypasses the upper part of the backpack body 1, the lower connecting belt structure 5 bypasses the lower part of the backpack body 1 and the expansion portion 101, and the backpack body 1 is provided with an adjustable belt structure 2. When the main body 1 is in use, the space capacity inside the backpack main body 1 can be adjusted by folding, storing and stretching the expansion part 101, and the two ends of the lower connecting belt structure 5 and the backpack tower buckle 4 can be adjusted according to the stretching degree of the expansion part 101, so as to achieve the tightening of the expansion part 101. When the expansion part 101 is in the contracted state, the weight of the items inside the backpack main body 1 is transmitted to the backpack main body 1 through the closed loop body, and the weight of the items in the backpack is borne as a whole, ensuring the stability of the force, which can effectively avoid the occurrence of single-point force causing the force-bearing point to be pulled and damaged.
[0025] Specifically, the upper connecting strap structure 3 includes a first connecting strap 301, a second connecting strap 302 and a buckle 306. The second connecting strap 302 is movably connected to the corresponding end of the first connecting strap 301 through the buckle 306. The first connecting strap 301 is arranged around the backpack body 1, and the second connecting strap 302 can be freely disassembled and assembled with the first connecting strap 301 through the buckle 306, so that the lower connecting strap structure 5 can be quickly removed.
[0026] Furthermore, the buckle 306 is fixedly arranged at the two ends of the top of the second connecting belt 302, and buckle holes 305 corresponding to the buckle 306 are opened at both ends of the first connecting belt 301, and the buckle 306 is buckled with the buckle hole 305, and the buckle 306 is buckled in the buckle hole 305 to realize the connection between the second connecting belt 302 and the first connecting belt 301.
[0027] Furthermore, the bottom of the second connecting belt 302 is arranged at the sleeve end 303 , and the sleeve end 303 is fixedly connected to the backpack tower buckle 4 , and the second connecting belt 302 is fixedly connected to the backpack tower buckle 4 through the sleeve end 303 .
[0028] It is worth noting that a notch 304 is provided on the surface of the first connecting strap 301 , and the notch 304 corresponds to the zipper of the backpack body 1 , so that the notch 304 makes it convenient to expose the zipper on the backpack body 1 , thereby preventing the first connecting strap 301 from blocking the zipper on the backpack body 1 .
[0029] It is worth mentioning that a plurality of groups of perforated belts 102 are evenly arranged around the backpack body 1, and the first connecting belt 301 passes through the perforated belts 102, which facilitate the insertion and installation of the first connecting belt 301, thereby arranging the first connecting belt 301 around the backpack body 1.
[0030] In an embodiment of the utility model, the lower connecting belt structure 5 includes a third connecting belt 501, and the middle section of the third connecting belt 501 is a wrapping groove 502, and the wrapping groove 502 wraps the extension part 101. The third connecting belt 501 can quickly realize the positioning support of the extension part 101 through the wrapping groove 502, and is not prone to sliding. It can also increase the supporting force area of the extension part 101 and have a restraining effect on the extension part 101, thereby ensuring the supporting stability of the extension part 101 and making the extension part 101 not easy to deform. When the extension part 101 is folded and stored, the wrapping groove 502 can completely store the extension part 101, thereby avoiding the extension part 101 from being exposed, which can greatly improve the overall aesthetics of the backpack, and some items can also be stored inside the wrapping groove 502, such as umbrellas, water cups, etc., so that the practical performance of the backpack is better.
[0031] Working principle: This embodiment provides a backpack with adjustable volume. First, when the backpack body 1 is in use, the space capacity inside the backpack body 1 can be adjusted by folding, storing and stretching the expansion part 101, and the two ends of the lower connecting belt structure 5 and the backpack tower buckle 4 can be adjusted according to the stretching degree of the expansion part 101, so as to realize the tightening of the expansion part 101. When the expansion part 101 is in the contracted state, the weight of the items inside the backpack body 1 is transmitted to the backpack body 1 through the closed loop body, and the weight of the items in the backpack is carried as a whole, ensuring the stability of the force, which can effectively avoid the situation that the force-bearing part is pulled and damaged due to single-point force.
[0032] Secondly, the third connecting belt 501 can quickly realize the positioning support of the extension part 101 through the wrapping groove 502, which is not easy to slip and can increase the supporting force area of the extension part 101 and have a restraining effect on the extension part 101, thereby ensuring the supporting stability of the extension part 101 and making the extension part 101 not easy to deform. When the extension part 101 is folded and stored, the wrapping groove 502 can completely store the extension part 101, thereby avoiding the extension part 101 from being exposed, which can greatly improve the overall aesthetics of the backpack, and some items can also be stored in the wrapping groove 502, such as umbrellas, water cups, etc., which makes the backpack more practical.
[0033] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.
Claims
1. A backpack with adjustable volume, characterized in that: The backpack comprises a backpack body (1), the bottom of which is provided with an expansion portion (101), an adjustment belt structure (2) is arranged around the backpack body (1), the adjustment belt structure (2) comprises an upper connecting belt structure (3), a backpack buckle (4) and a lower connecting belt structure (5), the upper connecting belt structure (3) is connected to the lower connecting belt structure (5) through the backpack buckle (4) to form a closed loop, the two ends of the lower connecting belt structure (5) are movably connected to the backpack buckle (4), the upper connecting belt structure (3) bypasses the upper part of the backpack body (1), and the lower connecting belt structure (5) bypasses the lower part of the backpack body (1) and the expansion portion (101); The lower connecting belt structure (5) comprises a third connecting belt (501), the middle section of the third connecting belt (501) is a wrapping groove (502), and the wrapping groove (502) wraps the extension part (101).
2. A volume adjustable backpack according to claim 1, characterized in that: The upper connecting belt structure (3) comprises a first connecting belt (301), a second connecting belt (302) and a buckle (306); the second connecting belt (302) is movably connected to the corresponding end of the first connecting belt (301) via the buckle (306).
3. The volume-adjustable backpack according to claim 2, characterized in that: The lock buckle (306) is fixedly arranged at the two ends of the top of the second connecting belt (302), and buckle holes (305) corresponding to the lock buckle (306) are opened at both ends of the first connecting belt (301), and the lock buckle (306) is buckled with the buckle holes (305).
4. The volume-adjustable backpack according to claim 2, characterized in that: The bottom of the second connecting belt (302) is arranged at the sleeve end (303), and the sleeve end (303) is fixedly connected to the backpack tower buckle (4).
5. The volume-adjustable backpack according to claim 2, characterized in that: A notch (304) is provided on the surface of the first connecting belt (301), and the notch (304) corresponds to the zipper of the backpack body (1).
6. The volume-adjustable backpack according to claim 2, characterized in that: A plurality of groups of perforated belts (102) are arranged equidistantly around a circumference of the backpack body (1), and the first connecting belt (301) passes through the perforated belts (102).