Knapsack with length convenient to adjust
By introducing adjustment structure and support plates into the backpack, the problem of children's backpack being unadjustable and tilted is solved, and adjustment and stability improvement are achieved according to height and weight.
Patent Information
- Application Number
- CN202422086458.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing backpack design does not consider the height growth rate of children and cannot adjust the length, resulting in discomfort in use; the backpack is prone to falling over without items placed.
An adjustment structure is designed, including a tie rod, spring, press plate, rotary shaft, clock spring and inner and outer adjustment belt, the shoulder strap length is adjusted by pulling the tie rod, and a support plate and a skid plate are equipped to keep the backpack upright.
It realizes adjusting the shoulder strap length according to the user's height and backpack weight to prevent backpack from tipping, and improves the adaptability of use and placement stability.
Smart Images
Figure CN223126044U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of backpacks, and particularly relates to a backpack with adjustable length. Background Technique
[0002] A backpack refers to a bag carried on the back, made of different materials such as leather, plastic materials, polyester, canvas, nylon, cotton and linen. In the era that increasingly emphasizes individuality, various styles such as simple, retro, and cartoon also meet people's need to pursue individuality from all aspects. The styles of bags have extended from traditional business bags, backpacks, travel bags to pencil cases, coin purses, sachets, etc.
[0003] At present, when designing existing backpacks, the growth rate of children's height is not considered. Only backpacks of different sizes are provided, and the length of the backpack cannot be adjusted, making the backpack uncomfortable to use. Moreover, when there are no items or few items placed inside the existing backpack, the backpack as a whole cannot be kept upright, resulting in the backpack being prone to tipping to one side when placed. For this reason, we propose a backpack with adjustable length. Content of the Utility Model
[0004] In order to overcome the above technical problems, the purpose of the utility model is to provide a backpack with adjustable length to solve the problems in the above background technique that when designing existing backpacks, the growth rate of children's height is not considered, only backpacks of different sizes are provided, and the length of the backpack cannot be adjusted, making the backpack uncomfortable to use, and when there are no items or few items placed inside the existing backpack, the backpack as a whole cannot be kept upright, resulting in the backpack being prone to tipping to one side when placed.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A backpack with adjustable length, including a backpack body, a shoulder strap is fixedly connected to the surface of the backpack body, an anti-slip plate one is fixedly connected to the inner surface of the shoulder strap, an outer adjustment strap is fixedly connected to the bottom of the shoulder strap, an adjustment structure is arranged inside the backpack body, the adjustment structure includes a pull rod, a pressure plate is fixedly connected to the surface of the pull rod, a spring is fixedly connected to the surface of the pressure plate, a rotating shaft is movably connected to the surface of the pressure plate, a clockwork spring is fixedly connected to the surface of the rotating shaft, an inner adjustment strap is fixedly connected to the surface of the clockwork spring, the pull rod is movably connected to the surface of a housing, an anti-slip plate two is fixedly connected to the bottom of the backpack body, a support plate is fixedly connected to the inside of the backpack body, and a handle is fixedly connected to the top of the backpack body.
[0006] Preferably, the pull rod, the spring, the pressure plate, the rotating shaft, the clockwork spring and the inner adjustment strap are all installed in the cavity inside the housing, and the pull rod penetrates through the housing and the shoulder strap.
[0007] Preferably, one end of the spring is fixedly connected to the surface of the pressing plate, and the other end of the spring is fixedly connected to the inner wall of the housing.
[0008] Preferably, when the spring is in an uncompressed state, the surface of the pressing plate is in contact with the side surface of the spiral spring.
[0009] Preferably, one end of the spiral spring near the center of the circle is fixedly connected to the surface of the rotating shaft, the other end of the spiral spring far from the center of the circle is connected to the inner adjusting belt, and the inner adjusting belt is fixedly connected to the outer adjusting belt.
[0010] Preferably, rubber bumps are provided on the surfaces of the first anti-slip plate and the second anti-slip plate.
[0011] Preferably, the support plate is a lightweight L-shaped iron sheet, the support plate is arranged above the second anti-slip plate, and the support plate is fixedly connected to the inner wall of the backpack body.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0013] 1. The backpack for facilitating length adjustment is provided with an adjustment structure. By pulling the pull rod, the pressing plate is separated from the side surface of the spiral spring. At this time, the length of the outer adjustment belt can be adjusted. After releasing the pull rod, under the action of the spring, the pressing plate is pressed on the surface of the spiral spring, so that the spiral spring is tightened, thereby fixing the length of the outer adjustment belt after adjustment, enabling the backpack to adjust the length of the backpack strap according to the different heights of the users and the different weights of the items carried in the backpack, with high practicality.
[0014] 2. The backpack for facilitating length adjustment is provided with a support plate and a second anti-slip plate. The L-shaped support plate enables the backpack to still maintain the overall upright state when there are no items or few items placed inside the backpack. The relatively hard second anti-slip plate can make the backpack not easily fall over when placed, making it more convenient to place the backpack. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a front three-dimensional structure schematic diagram of the present utility model;
[0016] Figure 2 is a side three-dimensional structure schematic diagram of the present utility model;
[0017] Figure 3 is a three-dimensional structure schematic diagram of the shoulder strap, outer adjustment belt and adjustment structure of the present utility model;
[0018] Figure 4 is a partial structure explosion schematic diagram of the adjustment structure of the present utility model;
[0019] Figure 5This is a three-dimensional structural schematic diagram of the anti-slip plate two and the support plate of the present utility model.
[0020] In the figure: 1. Backpack body; 2. Upper shoulder strap; 3. Anti-slip plate one; 4. Outer adjustment strap; 5. Adjustment structure; 51. Pull rod; 52. Spring; 53. Pressure plate; 54. Rotating shaft; 55. Hairspring; 56. Inner adjustment strap; 6. Anti-slip plate two; 7. Support plate; 8. Handle. Specific implementation mode
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0022] Please refer to Figures 1-5 , an embodiment provided by the present utility model:
[0023] A backpack with adjustable length includes a backpack body 1. The surface of the backpack body 1 is fixedly connected with an upper shoulder strap 2. The inner surface of the upper shoulder strap 2 is fixedly connected with an anti-slip plate one 3. The bottom of the upper shoulder strap 2 is fixedly connected with an outer adjustment strap 4. An adjustment structure 5 is arranged inside the backpack body 1. The adjustment structure 5 includes a pull rod 51. The surface of the pull rod 51 is fixedly connected with a pressure plate 53. The surface of the pressure plate 53 is fixedly connected with a spring 52. The surface of the pressure plate 53 is movably connected with a rotating shaft 54. The surface of the rotating shaft 54 is fixedly connected with a hairspring 55. The surface of the hairspring 55 is fixedly connected with an inner adjustment strap 56. The surface of the pull rod 51 is movably connected with a housing 57. The bottom of the backpack body 1 is fixedly connected with an anti-slip plate two 6. The inside of the backpack body 1 is fixedly connected with a support plate 7. The top of the backpack body 1 is fixedly connected with a handle 8. The adjustment structure 5 is provided. By pulling the pull rod 51, the pressure plate 53 is separated from the side surface of the hairspring 55. At this time, the length of the outer adjustment strap 4 can be adjusted. After releasing the pull rod 51, under the action of the spring 52, the pressure plate 53 is pressed on the surface of the hairspring 55, so that the hairspring 55 is compressed, thereby fixing the length of the outer adjustment strap 4 after adjustment. This enables the backpack to adjust the length of the backpack straps according to the different heights of users and different weights of items carried in the backpack, with high practicality. The support plate 7 and the anti-slip plate two 6 are provided. The L-shaped support plate 7 enables the backpack to remain upright as a whole even when there are few or no items inside. The relatively hard anti-slip plate two 6 can prevent the backpack from tipping over when placed, making it more convenient to place the backpack.
[0024] Further, the drawbar 51, the spring 52, the pressure plate 53, the rotating shaft 54, the clockwork spring 55 and the inner adjusting belt 56 are all installed in the cavity inside the housing 57. The drawbar 51 penetrates through the housing 57 and the upper shoulder strap 2, and the drawbar 51 can move inside the housing 57 and the upper shoulder strap 2.
[0025] Further, one end of the spring 52 is fixedly connected to the surface of the pressure plate 53, and the other end of the spring 52 is fixedly connected to the inner wall of the housing 57. The drawbar 51 cooperates with the spring 52 to drive the pressure plate 53 to move.
[0026] Further, when the spring 52 is in an uncompressed state, the surface of the pressure plate 53 is in contact with the side surface of the clockwork spring 55, and the pressure plate 53 is pressed against the side surface of the clockwork spring 55 by the spring 52.
[0027] Further, one end of the clockwork spring 55 near the center of the circle is fixedly connected to the surface of the rotating shaft 54, and the other end of the clockwork spring 55 far from the center of the circle is connected to the inner adjusting belt 56. The inner adjusting belt 56 is fixedly connected to the outer adjusting belt 4, and the length of the outer adjusting belt 4 is adjusted by the torsion of the clockwork spring 55.
[0028] Further, rubber bumps are provided on the surfaces of the first anti-slip plate 3 and the second anti-slip plate 6. The first anti-slip plate 3 provides frictional anti-slip for the user's shoulder, and the second anti-slip plate 6 provides frictional force when the backpack is placed.
[0029] Further, the support plate 7 is a lightweight L-shaped iron sheet. The support plate 7 is arranged above the second anti-slip plate 6. The support plate 7 is fixedly connected to the inner wall of the backpack body 1. Through the L-shaped support plate 7, the backpack can still maintain the overall upright state when there are no items or few items inside.
[0030] Working principle: When using the backpack, first pull the drawbar 51 to make the pressure plate 53 leave the side surface of the clockwork spring 55. At this time, pull the outer adjusting belt 4 to drive the inner adjusting belt 56 to move, and then drive the clockwork spring 55 to rotate, so as to adjust the length of the outer adjusting belt 4. The clockwork spring 55 will apply a torsion force to pull the outer adjusting belt 4 back to the center of the circle. At this time, after releasing the drawbar 51, under the action of the spring 52, the pressure plate 53 is pressed against the surface of the clockwork spring 55, so that the clockwork spring 55 is tightened, thereby fixing the length of the adjusted outer adjusting belt 4. The L-shaped support plate 7 enables the backpack to still maintain the overall upright state when there are no items or few items inside. The relatively hard second anti-slip plate 6 can prevent the backpack from tipping over easily when placed, making it more convenient to place the backpack.
[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.
Claims
1. A backpack with adjustable length, comprising a backpack body (1), characterized in that: A shoulder strap (2) is fixedly connected to the surface of the backpack body (1). An anti-slip plate I (3) is fixedly connected to the inner surface of the shoulder strap (2). An outer adjustment strap (4) is fixedly connected to the bottom of the shoulder strap (2). An adjustment structure (5) is arranged inside the backpack body (1). The adjustment structure (5) includes a pull rod (51). A pressing plate (53) is fixedly connected to the surface of the pull rod (51). A spring (52) is fixedly connected to the surface of the pressing plate (53). A rotating shaft (54) is movably connected to the surface of the pressing plate (53). A spiral spring (55) is fixedly connected to the surface of the rotating shaft (54). An inner adjustment strap (56) is fixedly connected to the surface of the spiral spring (55). The pull rod (51) is movably connected to a housing (57). An anti-slip plate II (6) is fixedly connected to the bottom of the backpack body (1). A support plate (7) is fixedly connected to the inside of the backpack body (1). A handle (8) is fixedly connected to the top of the backpack body (1).
2. The adjustable-length backpack according to claim 1, wherein: The pull rod (51), the spring (52), the pressing plate (53), the rotating shaft (54), the spiral spring (55) and the inner adjustment strap (56) are all installed in the cavity inside the housing (57). The pull rod (51) penetrates through the housing (57) and the shoulder strap (2).
3. The backpack with adjustable length according to claim 1, characterized in that: One end of the spring (52) is fixedly connected to the surface of the pressing plate (53), and the other end of the spring (52) is fixedly connected to the inner wall of the housing (57).
4. A backpack with adjustable length according to claim 1, characterized in that: When the spring (52) is in an uncompressed state, the surface of the pressing plate (53) is in contact with the side surface of the spiral spring (55).
5. A backpack with adjustable length according to claim 1, characterized in that: One end of the spiral spring (55) near the center of the circle is fixedly connected to the surface of the rotating shaft (54). The other end of the spiral spring (55) far from the center of the circle is connected to the inner adjustment strap (56). The inner adjustment strap (56) is fixedly connected to the outer adjustment strap (4).
6. The adjustable-length backpack according to claim 1, wherein: Rubber bumps are arranged on the surfaces of the anti-slip plate I (3) and the anti-slip plate II (6).
7. The backpack with adjustable length according to claim 1, wherein: The support plate (7) is a lightweight L-shaped iron sheet. The support plate (7) is arranged above the anti-slip plate II (6). The support plate (7) is fixedly connected to the inner wall of the backpack body (1).