Shoulder strap automatic return structure

Abstract

The utility model provides an automatic return structure for a shoulder strap. The automatic return structure comprises a bottom plate 1, a first V-shaped spring 2, a second V-shaped spring 3, a first rotating plate 4, a second rotating plate 5 and a cover plate 6, when the structure in the application is adopted to install the shoulder straps of the backpack, the positions of the shoulder straps above the backrest of the schoolbag main body can be dynamically moved in the transverse direction according to the left-right relative swing amplitude of the first rotating plate 4 and the second rotating plate 5. Besides, the rotating plate has inward reset elasticity under the action of the V-shaped spring, so that the shoulder strap can be driven to be kept at a position corresponding to the shape of the rotating plate, the shoulders of the user are ensured to be in close contact, and the risk that the shoulder strap slides off is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of backpack design, specifically to an automatic shoulder strap return structure. Background Technology

[0002] In existing backpacks, the shoulder straps are fixedly attached to the top of the backpack. During use, the shoulder straps gradually shift off the shoulder due to the weight of the backpack, causing the top of the backpack to tilt away from the user's back. This ultimately leads to the backpack's center of gravity separating from the user's back, making the backpack difficult to carry and feeling heavy. Furthermore, the lower part of the backpack backrest touches the user's back, further increasing discomfort. Therefore, this invention aims to solve the problems of the prior art by preventing the shoulder straps from shifting off the shoulder due to the weight of the backpack, ensuring that the shoulder remains in close contact with the backpack backrest. It proposes an automatic shoulder strap return structure that prevents separation from the user's back, reduces shoulder heaviness, and provides excellent usability. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model proposes an automatic shoulder strap return structure, which solves the problem that backpack shoulder straps tend to slip off automatically when carrying heavy loads.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] An automatic shoulder strap return structure includes a base plate, a first V-shaped spring, a second V-shaped spring, a first rotating plate, a second rotating plate, and a cover plate. The base plate includes a first limiting post, a second limiting post, a baffle, a rotating shaft, a limiting shaft, and a U-shaped outer wall. The U-shaped outer wall is circumferentially arranged along the upper end of the base plate, and its height is consistent with the first limiting post, the second limiting post, the baffle, the rotating shaft, and the limiting shaft. There are two of each of the first limiting post, the second limiting post, the baffle, the rotating shaft, and the limiting shaft, all located within the U-shaped outer wall and symmetrically arranged about the center line of the U-shaped outer wall. The first rotating plate further includes a first rotating plate body, a first meshing tooth, a first upper limiting block, a first lower limiting block, and a first rotating hole. The second rotating plate further includes a second rotating plate body, a second meshing tooth, a second upper limiting block, a second lower limiting block, and a second rotating hole. The two rotating plates are rotatably connected to two rotating shafts through the first and second rotating holes at the bottom. The first and second meshing teeth are respectively set on the opposite side of the first and second rotating plates. The first upper limit block, the first lower limit block, the second upper limit block, and the second lower limit block are respectively set on the opposite side of the first and second rotating plates. The first upper limit block and the first lower limit block are staggered vertically on the outer side of the first rotating plate. The second upper limit block and the second lower limit block are staggered vertically on the outer side of the second rotating plate. The V-shaped spring achieves the inward rotation and reset of the rotating plate by abutting the two legs of the "V" shape between the outer wall of the rotating plate and the inner side of the U-shaped outer wall. Among them, the leg of the "V" shape that abuts the outer wall of the rotating plate is located between the upper and lower limit plates, and the other leg is located below the inner baffle of the outer wall.

[0006] Preferably, the two first limiting posts are located inside the first rotating plate and the second rotating plate, and are used to limit the rotation of the first rotating plate and the second rotating plate when they rotate close together.

[0007] Preferably, the two second limiting posts are located on the upper outer side of the first rotating plate and the second rotating plate, and are used to limit the rotation of the first rotating plate and the second rotating plate away from each other.

[0008] Preferably, the baffle is located on the upper inner side of the U-shaped outer wall, extending downwards a certain distance from the upper surface of the U-shaped outer wall, leaving space for the V-shaped spring support leg to be inserted.

[0009] Preferably, the cover plate includes: a plate body; a first pin; a second pin; wherein the second limiting post and the rotating shaft are both hollow structures with a circular through hole in the middle, and the first pin and the second pin are respectively inserted into the circular through hole in the second limiting post and the rotating shaft.

[0010] Preferably, trapezoidal or rectangular strap holes are provided on the top of the first rotating plate body and the second rotating plate body for connecting the strap to the rotating plate.

[0011] The automatic shoulder strap return structure proposed in this utility model has the following beneficial effects:

[0012] When the backpack shoulder straps are installed using the structure described in this application, the position of the shoulder straps above the back of the main body of the backpack can be dynamically moved laterally according to the relative swing amplitude of the first rotating plate 4 and the second rotating plate 5, ensuring that the user's shoulders remain in close contact, thereby eliminating the risk of the shoulder straps slipping off. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 : Exploded view of an automatic shoulder strap return structure of this utility model;

[0015] Figure 2 : Schematic diagram of the bottom plate structure of this utility model;

[0016] Figure 3 : Schematic diagram of the rotating plate structure in this utility model;

[0017] Figure 4 : Schematic diagram of the cover plate structure of this utility model;

[0018] Figure 5 : Assembly diagram of the automatic shoulder strap return structure in this utility model;

[0019] The reference numerals in the attached drawings are as follows: 1. Base plate; 11. First limiting post; 12. Second limiting post; 13. Baffle; 14. Rotating shaft; 15. Limiting shaft; 16. U-shaped outer wall; 2. First V-shaped spring; 3. Second V-shaped spring; 4. First rotating plate; 41. First rotating plate body; 42. First meshing tooth; 43. First upper limit block; 44. First lower limit block; 45. First rotating hole; 5. Second rotating plate; 51. Second rotating plate body; 52. Second meshing tooth; 53. Second upper limit block; 54. Second lower limit block; 55. Second rotating hole; 6. Cover plate; 61. Plate body; 62. First pin; 63. Second pin. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 5 As shown, an automatic shoulder strap return structure in this application includes: a base plate 1, a first V-shaped spring 2, a second V-shaped spring 3, a first rotating plate 4, a second rotating plate 5, and a cover plate 6;

[0022] The first rotating plate 4 and the second rotating plate 5 are symmetrically arranged on the base plate 1, with their lower ends rotatably mounted on the base plate 1. Teeth are provided on the opposite sides of the first rotating plate 4 and the second rotating plate 5 (i.e., the inner sides of the first rotating plate 4 and the second rotating plate 5), allowing them to swing freely in the left-right direction through tooth meshing. Furthermore, a first V-shaped spring 2 and a second V-shaped spring 3 are respectively installed between the outer sides of the first rotating plate 4 and the base plate and their respective outer sides, for automatic reset when the first rotating plate 4 and the second rotating plate 5 swing in the left-right direction. A cover plate 6 is fixedly mounted on the base plate 1 by a pin, clamping the first V-shaped spring 2, the second V-shaped spring 3, the first rotating plate 4, and the second rotating plate 5 between the base plate 1 and the cover plate 6, ensuring stable rotation of the rotating plates between the base plate 1 and the cover plate 6.

[0023] like Figure 2 As shown, the base plate 1 includes a first limiting post 11, a second limiting post 12, a baffle 13, a rotating shaft 14, a limiting shaft 15, and a U-shaped outer wall 16. The U-shaped outer wall is arranged circumferentially along the upper end of the base plate 1, and its height is consistent with that of the first limiting post 11, the second limiting post 12, the baffle 13, the rotating shaft 14, and the limiting shaft 15. There are two of each of the first limiting post 11, the second limiting post 12, the baffle 13, the rotating shaft 14, and the limiting shaft 15, and they are all located inside the U-shaped outer wall and are symmetrically arranged about the center line of the U-shaped outer wall 16. The first rotating plate 4, the second rotating plate 5, the second rotating plate 6, the second rotating plate 7, the second rotating plate 8, the second rotating plate 9, the second rotating plate 10, the second rotating plate 11, the second rotating plate 12, the second rotating plate 13, the second rotating plate 14, the second rotating plate 15, the second rotating plate 16 ... The movable plate 5 is rotatably connected to the two rotating shafts 14 through the through holes at the bottom. The two first limiting posts 11 are located inside the first rotating plate 4 and the second rotating plate 5, and are used to limit the rotation of the first rotating plate 4 and the second rotating plate 5 when they are close together. The two second limiting posts 12 are located outside the upper end of the first rotating plate 4 and the second rotating plate 5, and are used to limit the rotation of the first rotating plate 4 and the second rotating plate 5 when they are far apart. The baffle 13 is located inside the upper part of the U-shaped outer wall 16, and extends downward a certain distance from the upper surface of the U-shaped outer wall, leaving space for the V-shaped spring support leg to be inserted.

[0024] like Figure 3 As shown, the first rotating plate 4 further includes a first rotating plate body 41, a first meshing tooth 42, a first upper limit block 43, a first lower limit block 44, and a first rotating hole 45; the second rotating plate 5 further includes a second rotating plate body 51, a second meshing tooth 52, a second upper limit block 53, a second lower limit block 54, and a second rotating hole 55; the first rotating plate 4 and the second rotating plate 5 are rotatably connected to the two rotating shafts 14 through the through holes 45 and 55 respectively opened at the bottom; the first meshing tooth 42 is a first meshing tooth 43, a first upper limit block 43, a first lower limit block 44, and a first rotating hole 45. The first upper limit block 42 and the second lower limit block 52 are respectively located on the adjacent sides of the first rotating plate 4 and the second rotating plate 5. The first upper limit block 43, the first lower limit block 44, the second upper limit block 53, and the second lower limit block 54 are respectively located on the opposite sides of the first rotating plate 4 and the second rotating plate 5. The first upper limit block 43 and the first lower limit block 44 are staggered vertically on the outer side of the first rotating plate 4. Similarly, the second upper limit block 53 and the second lower limit block 54 are also staggered vertically on the outer side of the second rotating plate 5. The V-shaped spring achieves the inward rotation and reset of the rotating plate by having the two legs of the "V" abut against the outer wall of the rotating plate and the inner side of the U-shaped outer wall 16, respectively. The leg of the "V" that abuts against the outer wall of the rotating plate is located between the upper and lower limit plates, and the other leg is located below the inner baffle 13 of the outer wall. This ensures that the V-shaped spring remains stable between the first rotating plate 4, the second rotating plate 5, and the U-shaped outer wall 16.

[0025] like Figure 4 As shown, the cover plate 6 includes: a plate body 61; a first pin 62; and a second pin 63. The second limiting post 12 and the rotating shaft 14 are both hollow structures with a circular through hole in the middle. The first pin 62 and the second pin 63 are respectively inserted into the circular through hole in the second limiting post 12 and the rotating shaft 14 to fix the cover plate to the base plate.

[0026] Furthermore, trapezoidal or rectangular shoulder strap holes are provided on the top of the first rotating plate body 41 and the second rotating plate body 51 for connecting the shoulder straps to the rotating plates. When the backpack shoulder straps are installed using the structure of this application, the position of the shoulder straps above the back of the backpack body can dynamically move laterally according to the relative left and right swing amplitude of the first rotating plate 4 and the second rotating plate 5. In addition, since the rotating plates have inward restoring elasticity under the action of the V-shaped spring, they can keep the shoulder straps in a position corresponding to their body shape, ensuring that the user's shoulders are in close contact, thereby eliminating the risk of the shoulder straps slipping off; furthermore, since the rotating plates drive the shoulder straps to perform a restoring movement, the user can also achieve a certain degree of levitation and effort-saving effect on the backpack during walking by using the elasticity and restoring of the shoulder straps.

[0027] In this embodiment, the shoulder strap design comprises a two-layer structure: the upper layer is made of thick leather or synthetic resin material, providing robust support. The lower layer is formed by wrapping thin leather or synthetic resin material around a foamed synthetic resin core, increasing comfort and flexibility.

[0028] The two layers are tightly joined by overlapping and stitching the edges together. Furthermore, the shoulder strap design incorporates elastic elements, such as elastic synthetic resin plates, elastic metal plates, or elastic threads, which can be added between the upper and lower layers (especially in the connection area between the upper and lower parts of the shoulder strap) to enhance the strap's elasticity and adaptability.

[0029] This design not only ensures the durability and comfort of the shoulder straps, but also optimizes their functionality and performance in the overall wear through a clever layered structure and optional elastic elements.

[0030] As can be seen from the accompanying drawings, in the embodiments of this utility model, the fixed connection and relative sliding of each component can be achieved by conventional methods of the prior art. The specific implementation method will not be further described in this utility model specification.

[0031] The embodiments and descriptions above are merely illustrative of the principles and preferred embodiments of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A shoulder strap automatic return structure, comprising a base plate (1), a first V-shaped spring (2), a second V-shaped spring (3), a first rotating plate (4), a second rotating plate (5), and a cover plate (6); wherein, The base plate (1) includes a first limiting post (11), a second limiting post (12), a baffle (13), a rotating shaft (14), a limiting shaft (15), and a U-shaped outer wall (16). The U-shaped outer wall is arranged circumferentially along the upper end of the base plate (1), and its height is consistent with that of the first limiting post (11), the second limiting post (12), the baffle (13), the rotating shaft (14), and the limiting shaft (15). There are two of each of the first limiting post (11), the second limiting post (12), the baffle (13), the rotating shaft (14), and the limiting shaft (15), and they are all positioned... The first rotating plate (4) is symmetrically arranged on the left and right sides with the center line of the U-shaped outer wall (16) as the axis of symmetry. The first rotating plate (4) includes a first rotating plate body (41), a first meshing tooth (42), a first upper limit block (43), a first lower limit block (44), and a first rotating hole (45). The second rotating plate (5) includes a second rotating plate body (51), a second meshing tooth (52), a second upper limit block (53), a second lower limit block (54), and a second rotating hole (55). The first rotating plate (4) and the second rotating plate (5) are symmetrically arranged on the left and right sides with the center line of the U-shaped outer wall (16) as the axis of symmetry. The first rotating hole (45) and the second rotating hole (55) are rotatably connected to the two rotating shafts (14) through the through holes opened at the bottom; the first meshing teeth (42) and the second meshing teeth (52) are respectively set on the side of the first rotating plate (4) and the second rotating plate (5) that are adjacent to each other; the first upper limit block (43), the first lower limit block (44) and the second upper limit block (53) and the second lower limit block (54) are respectively set on the side of the first rotating plate (4) and the second rotating plate (55) that are opposite to each other. 3) The first lower limit block (44) is staggered on the outside of the first rotating plate (4); the second upper limit block (53) and the second lower limit block (54) are staggered on the outside of the second rotating plate (5); the V-shaped spring realizes the rotation of the rotating plate inward by abutting the two legs of the "V" between the outer wall of the rotating plate and the inner side of the U-shaped outer wall (16); the leg of the "V" that abuts the outer wall of the rotating plate is located between the upper and lower limit plates, and the other leg is located below the inner side baffle (13) of the outer wall.

2. The automatic shoulder strap return structure according to claim 1, characterized in that: Two first limiting posts (11) are located inside the first rotating plate (4) and the second rotating plate (5) to limit the rotation of the first rotating plate (4) and the second rotating plate (5) when they rotate close together.

3. The automatic shoulder strap return structure according to claim 2, characterized in that: Two second limiting posts (12) are located on the upper outer side of the first rotating plate (4) and the second rotating plate (5) and are used to limit the rotation of the first rotating plate (4) and the second rotating plate (5) away from each other.

4. The automatic shoulder strap return structure according to claim 1, characterized in that: The baffle (13) is located on the upper inner side of the U-shaped outer wall (16), extending downward a certain distance from the upper surface of the U-shaped outer wall, leaving space for the V-shaped spring support leg to be inserted.

5. The automatic shoulder strap return structure according to claim 1, characterized in that: The cover plate (6) includes: a plate body (61), a first pin (62), and a second pin (63); wherein the second limiting post (12) and the rotating shaft (14) are both hollow structures with a circular through hole in the middle, and the first pin (62) and the second pin (63) are respectively inserted into the circular through hole in the second limiting post (12) and the rotating shaft (14).

6. The automatic shoulder strap return structure according to claim 5, characterized in that: The first rotating plate body (41) and the second rotating plate body (51) have trapezoidal or rectangular strap holes on their tops for connecting the straps to the rotating plates.

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